SanDisk SDSDU-032G-AFFP Ultra 32GB Class 10 SDHC Memory Card for $19.99.  Shipping is free on orders over $25. If needed, use this Filler Tool to pad the order to qualify for free shipping.  Here is a screenshot for your reference.  It features up to 20MB/sec data transfer rate, and built-in write-protect switch.  Most places have it for about $27 [...]